*{
    padding: 0;
    margin: 0;
    list-style: none;
    box-sizing: border-box;
}
.wrap{
    width: 100vw;
    height: 100vh;
    display: flex;
}
.left{
    width: 20vw;
    height: 100vh;
    overflow-y: auto;
}
.left div{
    height: 100px;
    line-height: 100px;
    text-align: center;
}
.right{
    width: 80vw;
    height: 100vh;
    overflow-y: auto;
}
.right view{
    line-height: 20px;
}
.active{
    color: red;
}